Honing tool for tubes



Feb, 29, 1944. J E KLlNE I HONING lrooL FoR'TUBEs ZSheets-Sheet 1 Filed Dec. l5, 1940 Feb. 29, 1944. J. E. KLINE HONING TOOL FOR TUBES Filed ;De c. 13, 1940 Sheets-Sheet 2- INVENTOR I? .Z /f/}7.e.

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,.v k Am NAAQS MUM/UW ,//////m Patented Feb. 29, 1944 UNITED STATES PATENT GFFICE A' l .2,343,013y ,I

HoNINor 'rooL Fon ".rUBEsl John E. Kline, Grosse Pointe FarmaMich., as-.' signor to Micromatic HonepfCorporation, Detroit, Mich., a ,corporation of Michigan Application December 13, 1340, serial NQ.' 3.69.925'f 12 claims.. (01.;,51f-1s4) My invention relatesto honing tools, and particularly toA a honing toolfor machining the walls of cylindrical tubing of considerable length.

The present inventioncomprises a tool body having a plurality-oi annularly .disposed sets oi abrasives withthe adjacent sets circumferentially offset from one another and having guiding elements to align thebody of the toolwith the axis of the bore. A .plurality of sections of tubing formed in extensionof the body are likewise provided with guides tomaintain the axis of the sections disposed in alignment with the axis ofthe bore. A short universal coupling is provided between the ends of the sections of tubing and the tool to prevent Weight of the sections from being transferred to the tool so that the tool is free to follow theaxis of the bore. When a short section of tubing is employed for .short bores, 'a universal connection is employed which joins the driving end of the toolwith the tool body while an actuating element extends through the driving end. 'A universal connection is provided between the actuating member within the body which controls the radial position of the abrasive elements and the actuating element therefor `within the sections. l

On the opposite endof thetubular sections to that secured to the tool driving end, adjusting mechanism is provided by which the central actuating member is moved longitudinally to radially position the abrasive sto-nes.. A suitable supporting and driving head is attached to the yadjusting head by which the-tool is drivenin rotation and reciprocation, and through which the adjusting mechanism is actuated. Means are provided for removably attaching the adjusting head to the tubular section, the tubular sections to each other and for joining the tubular sections to the tool driving end. The connections are readily attachable, detachable, and interchanged, so that the tool and tubular extensions may be quickly separated or quickly joined to each other, the adjusting head, and the tool.

Accordingly, the main objects of my invention are; to provide a honing tool made up of a plurality of sections which are readily attached and separated; to provide a honing body `having a tubular extension with an adjusting head which is releasably secured thereto and which controls the radial position` of the abrasivestones ci the tool body; to provide a plurality of releasable sections foi'niinga honing tool, each of which is provided with a. guidi-ng` element to maintain the tool body and, sections in axial alignment with the axis of the bore; to provide an adjusting head.

indicated by the letter` C;

with .means for radially positioningthe abrasive stone of the tool and with,adrivingv end through which the adjustinghead may be further shifted to further control the position .ci the abrasive stone; and inA general, to. providea 'tool formachining ,bores ofextended length, which is simple in construetiompositive in operation, andec'onomical of manufacture. l

Other objects and features of novelty of my invention will be eitherspecically pointedout or will become apparent when referrin'g, for. a better understanding of my invention, to the following description taken in conjunctionwith the accompanying drawings,y wherein;v

Figure -l is a yview inY elevation cfa honing tool embodying features of myinvention;

` Fig. 2 is an enlargedsectional view of the lefthand end ofthe tool illustrated in Fig. 1',` indicatedby theletter A;

Fig. 3 is an enlarged sectional view of the central joini gjportion ,oi the tool illustrated in Fig.

1, indicated by .the letter B;

Fig. 4 is an enlarged sectional view of the lefthand end of thevtool portion illustrated in Fig. 1,

Fig.v 5 isjan enlarged se'ction'alview of the centralportion ofthe tool illustrated in Fig. 1, indicated by the letter Di n Fig. 6 is an enlargedsectional view of the righthand endof ,the .tool portion illustrated in Fig. 1, indicated by the' letter E, and

Fig. 'l is a broken sectional View of a universal coupling employed between the honing tool and the tubular driving sections.

In Fig. l, I haveillustrated Aa tool comprising a honing body I0,a driving and adjustinghead II, `and tubular sections `I2 and I3, any number of which can be employed, depending upon the length oi the cylinder to vbe honed. Suitable guiding elements are provided on the body and sections by which their axes are maintained aligned withthe axis of the bore being honed, and the weights of said body and tubular sections are solely supportable by their respective guiding elements.

The hone body I0 illustrated in Figs. 4, 5, and 6, comprises atubular element I4 having a universal connection I5, with the driving end I6 which is joined. to tubular section I3. An ad- .'justing rod; Il extendsv through the driving end I6 and universal. connection. I5, and ,has a ball spaced apart and disposed annularly about thef` element I4. Within the slots 23, 24, and 25, sets of abrasive stones 26 are mounted on radially movable shoes 21. adhesively or otherwise secured to a .metal backing element 28 having rearward projections26'- which extend into apertures v3I in the shoes 21 to prevent endwise movement' therebetween. The backing elements 28 extend, at 32, beyond the ends of the stones 26 and are engaged` by the ends 33 of springs 34which are nested Within slots 35 which are disposed in aligned relation with the apertures 23, 24, and 25 secured in position by screws 36... f lThe shoes 21 are of less length than the slots tfp'ermit the'shifting and tilting of the shoes on adjusting plates 31 which have arcuate cam portions 38 4upon which the inner surfaces 39 of th'eshoes engage. The inner faces of the adjusting plates`31 are provided. with spaced knife edges 4IV which are engaged by the conical surfaces ',42 disposed on the'adjusting element 22. "4 pair `Aof conical surfaces 42vare provided opposite each of theseries'fof annular slots 23, 24, and 25 to operate theabrasive stones 26 mounted therein, radially outwardly when the element 22 is .shifted to Vthe right" and .to have the abrasive elements'moveY radially inwardly, vthrough the force ofthe spring 33, when theelement 22 is moved to the left, as. viewed in thegures.

VAt thelower end ofthe tubular element I4 a .guide bushing 43 .is' provided 'forn guiding-the lower end offthe tool .body .I relative to the 'cylindricalsurface beinghoned. A similar bush- ,ingy 44 is provided near thefupper `end of the tubular element I4'fo1ft`l'1'e purpose of guiding the oppositeend of the toolV body IIlWithin the bore. The bushings comprisea'r'ingf45 which rotates on'the tubular'elementl,4of the body having axial thrust vwashers 46 at neach of its ends. A :plurality of. bore engaging elements 41 are mounted between the washers 46 which have a base 48 of cork or other resilient material abutted against the outer surfacezof vthe ring 45, The bushing 43 at the'endof the tool body is retained in position by. a nut 49 `while a pair. of shouldered rings I retain the Washers46 and the ring 45 in positon- In the bushing 44, the rings are split radially so as to be mountable upon the body, the unit being locked in position by a plurality ofscrews 52 which secure therings 5I in positi9r i. The annular .ring 45 and the annular thrust washers "46 on the .bushings 43 may be continuous as these may be mounted over the end projection of the tubularelement I4. 'I he.plurality ofthe bore. engaging elements 41 nre" removably' secured' against the outer face of, 4the ringv 45l by a pair of garter springs 53. The bore engaging elements may be removed when worn or replacedby other guiding elements `tojguide upon Va larger or smaller bore and are permitted 'tof move afslight amount radially through the compression ofthe cork or other :resilient material 4B- The tool body I0 is guided at both ends by the The abrasive stonesr 26' arebushings 43 and 44 which are rotatably mounted on the tool body to have the tubular body I4 rotate relative thereto while the bore engaging elements 41 are required to move only in reciprocation relative to the bore. The adjusting element 22 is moved to the right as viewed in the figure during a honing operation for moving the-adjusting plates 31 radially outwardly. This moves the shoes 21 and, therefore, the abrasive stones 26 outwardly under predetermined pressure to machine the wall of the bore as the tool body is rotated and reciprocated. After the abrasive operation, the movement of the adjusting elements; 22 to the left permits the adjusting plates 31; to move radially inwardly therewith under theinfluence' of the pressure stored in the springs 34. The abrasive stones will then be out of contact withthe bore Wall in view of the support of the tool body on the axis of the bore by the bushings 43 and 44. The tool may then be withdrawn `fromfvthe bore without `danger of' scratching the finish Vproduced by the honing; operation.

Referring more speciflcaly Vto Figs. 3 and 4,. the tubular sections I2 and I3 between the ad justing `head Il and the abrading tool body I0' will nowbe described. While two of the tubular' sections are ill ustrated in Eig. 1, it is to be un-A derstood that one or any number of sections may' be employed, depending on the length of the bore to b e machined. The tubular section I3 comprises an outer tube 55 having on the end adjacent to the tool,` a coupling section 56 secured thereto by suitable means herein illustrated as by welding 51. The coupling section 56 contains an internal thread 58 in which the mating threaded end of coupling section 59 of the driving end I6 of the tool may be threaded.

A sleeve 6I is adjustable lengthwise upon the body 56 being retained in position by a springpressed plunger v62 which projects within an aperture in thesleeve. The sleeve is the means by which a plurality of keys 63 are retained in slots 541m the body 56 andin the keyways 65 in the driving end I6 of the tool. A guide bushing 66 for the adjusting rod I1 of the tool is mounted on the inner wall of the threaded projection 59 through which a pinl 61 extends into a slot 68 in the rod to prevent the rod from turning relative to the drawing end I6. The projecting end of ,the rod I1 is provided with threads 69 by which the rod is attached to a head 1I slidablewithin the body 56. The head is secured by a pin 12 to a hollow tube 13 disposed within the vtube 55. When the tool is to be detached from the tubular section I3 the plunger 62 is released from the sleeve 6I and the sleeve is moved to the left to permit the keys 63 to be removed. Thereafter the tool adjusting end I6 is screwed out of the body 56, the rod I1 being screwedfrom the head 1I by the same movement because of the pin 61 which forces the rod I'I to turn with the tool driving end I6. The thread 69 on the rod is the same as the thread 58 on the body.

-A guide bushing 43, smilia r to the guide bushing 43 on the end of the tool body, is provided on the driving end I6 of the tool for positioning the end and therefore the end of the section I3 relative to the bore being machined. Apertures 14 are provided in the end I6 for the purpose of draining any coolant employed during the honing operation therefrom. For attaching the tool, a lreverse `operation occurs, the rod I1 being f threadedinto the head 1I Vthe same: time as the ,tl1readedend.; 59,0f theidriyingyen-d;I)6 of the 1 :tool isfbeing threaded :upon :the -threads,f 58with ;in the bodyx56. Thereafter; the-keys G Sareplaced fin the slots (541,andthelreywtys'gand the'sleeve :1.6i ,is moved tothe rightI as viewed inthegure .whereit is secured in .position .bythe- Dlfllnger 52. The opposite rend of :thesection I.3, is; illustrated ,inFig' 3. A.bodyf15;is secured rtothe end.of the sleeve ,55k by suitable means herein illustrated f1 as byv welding V16. The. opposite end of :thetubey :'1 31from thatsecured tofthe headilterminates Within theY bodyv and is maintained against .rotation by apairr of pins'` 11-Which project-into. slots ".118 in thetube end. This preventstthetubefrom turning when the rod I1 is being threadedinto .l orout .of the head 21I. --The'end of. thetube 13 .xabuts against and is secured to head 1;9 mounted .on the end of. a rod 8l which isbiasedto thezleft by. a spring 82 .abutted against a head'lwhich visthreaded on tothe endloff1the.-rodf8|. :The i coupling section 15A islprovided Withikeyways 65 in which keys G3 vmaybe mounted. @The outer endof thecoupling section :15.has azthreaded .end by which attachmentl is mada-.to vthe adi Vjoiningcoupling sectioniIZ. A guide. bushing 1534 isroounted on the sectionJ1-5 for-.guiding the vouter end of the tubularsection.y and ytheinner end of the tubular section l2. `Theibuslffung is maintained in position' byairing 4i)Y secured to the coupling section 1.5.

The tubular section -I2 -comprisesawtube 55 "having a coupling 35 securedthereto by1a suitf able means herein illustratedv as by Welding 51. The coupling contains an internalthreadedfend `I59 in which the threaded end off'theA coupling 15 'is secured. A head Mis-mounted within` the vcoupling 35 abuttecl against -the'head.83v...which is screw threaded on thefrod 8I. u Thelhead is carried by a tube 81 Whichis disposed Within the tube 55. A sleeve 6I is mounted on the couf pling 85 andvmaintained -in positiony by the .plunger @2. The sleeve,maintainsftl'lekeyT 63 in v 4positie-n Within lthe slots -64` inthe coupling 85 and the keyways 65inthe coupling?" 15. lThis secures the two sections in rigid dri/ving relation.' The opposite end of the tube A'55 is secured to a kmember 88, which is similar tocoupling section 85, by suitable means herein illustrated asvbyewelding 51. Thel tube 'iis secured to apistonf head f Se which is carried by a rod SI vwhich projects throughthe member. The rod 9|--has its ends lft-hreaded on the rod A-sleeve` 6I is vmounted over the member B' maintained in position by a plunger iZ. A sleeve maintains thefkeys 63 in position-in theslots 64 in the bodyl and the 5' keyways el in a tubular body @Sof thefadjusting head l. The member S8 is provided with threads f 53 while the body 93 hasa threadedend 59 by which the bodies are joined-together. 'I'hel keys -$3 maintain theV bodiesV in rigid driving relation so that the coupling section I2 'may -beoperated by the adjustinghead II. f vThe' body'BB of the adjusting `head II carries a sleeve Sli having an external threadl 95; pin .196 projects through the sleeve-andv through the rod S32 being maintained4 in central relation `by a spring pressed ball 91. They bodyt issecured to the driving head Sill by a pinil. Aplunger. IDI is mounted within the bodyfll hav-ing a slot-lll2 through which the pin t9 projects. .A pin-I03 v connect the plunger Vthan outer sleeve HJG. and v is movable within a slot vIlli providedin thebody .93. A spring ld urges the plunger IUI -to the left, aszvlewed in the guraagainst kay ringfl V.secured by suitable means onthe body 93. fA

three-fled Sleeve :.l-9f.iS1 -.xed t0 the Sleeve v l U4 ,a by a'ballbearing-,connection il! -while being rotatably disposed relatiyethereto. A plurality.v of

spring-pressed balls M2 operating in notches vI I3- 5; in the louter :face of the sleeve Iiflpositions the ,threaded sieeve ,flil relative to the sleeve 404.

I A.,h'and wheelV itil is secured to the threaded sleeve es byscrews i 5,5. By adjustingjgthe-hand Sie the sleevel isrrnoveo. to the rightor he bodygS-nioving thefrodl, the tube w h. This adjuststhe position ofthestonesradirelaiJ v-e to Athe bore while pressurevrnaybe n oyidf` ones throughctuationof the 15 p grigei n lill longitudinally to.l provide a feed lmfr/ement tothey abrasivestones radiallymoutwar i during-,the machining operation.

arivng head '88 ofthetool is securedto a .ingqend il? of the honingmn-chine through 20 which a rod, which may be loaded byfluid, a

. spring the likaabuts against theend-Aof the plu; er ilil. y'..lltthe end ofthehoningoperation the removal ofthe-pressure onthe plunger l0I will permit the spring t-i to move the plunger to e the spring 82 vin `the section I3 of the adjusting elements i .rlnitting the springs' to vInovethe tones radially inward.

`be understood that ,each additional 'ings 3:3 will'havesucient force w t abrasive stonesfradiallyinwardly. the stones have becomeJr/orn or4L areto be different diameter; the hand Wheel ed to produce.. diameter desired ich stones are nur. er. expanded. by

.m fgolun erft' during'the abrasiveoperation. nO -c or o sections .lil or if; are employed with the maf( mbores ci shorter-length. A universal con ection. lli may be employed between lzt'ne section 'some of the weight onmayzbe taken-by' thetool. How- -pling illustrated infFig. 1. Auniversal ion le is formed on each end of the coug with the tool-ifi)` and the'ftubularsection Balls 2i] arey disposed inslotsin each end of fthe tocland `tubular. sectionwiththe ball and -et connectionfcompleted by annular ringsvl22 so el?. I 3.

.relation in rotation therebetween in 't' ofthe balls 2e. The operati-ng rod `I'l has lote `1ini-vereal movement through the uni- (m .ve aly connection Yid--w'ith the actuating element of the tool so that nene of the weight of' the tubu- `lar sections aretransmitted to Athe tool.f f

While have described.y and illtnztratedV but a single' aod'linent of my inventionit will be 65 apparent to those skilled'in the art that `various changes. omissions, additions, and substitution be made therein without departing from the sn; scope vo1" my invention, as set forth in the acccmnanying claims. v

7u What Iclaimis: l

l. vA honing tool'including, in combination, a tool body, a tool adjusting end, a plurality of separable sections joining said body and adjustincr end, axially movableadjustingmeans extend- 1b ing from said body through said p1uralityofsections and adjusting end by Vwhich the tool body is adjusted in diameters, and means preventing said adjusting means from rotating relative to said sections.

2. A honing tool including, in combination, a tool body, a tool adjusting end, a plurality of separable sections joining said body and adjusting end, a plurality of separable adjusting means extending from said body through said plurality of sections and adjusting end by which the tool body is adjusted in diameters, and a. spring carried by a section and engaging the adjusting means thereof lfor urging said means toward tool collapsed position.

3. In a honing tool including, in combination, a tool body, abrasive stones carried by said body, means for adjusting said stones radially, a driving end for said body having a universal connection therewith, guide bushings carried by said tool at each of its ends and by said driving end, means extending through said driving end having universal connection with said tool adjusting means, and a tubular extension releasably attached to said driving end, a longitudinally movable element within said tubular extension releasably secured to the extending means of said adjusting means, and means for preventing said movable element from turning relative to said tubular extension.

4. In a honing tool including, in combination,-

a tool body, abrasive stones carried by said body, means for adjusting said stones radially, a driving end for said body having a universal connection within said tube extension releasably secured to the extending means of said adjusting means, means for preventing said movable element from turning relative to said tubular extension, and

' an adjusting end releasably secured to said tubular extension having means for engaging and adjusting said longitudinally movable means.

5. In a honing tool including, in combination, a tool body, abrasive stones carried by said body, means for adjusting said stones radially, a driving end for said body having a universal connection therewith, guide bushings carried by said tool at each of its ends and by said driving end, means extending through said driving end having universal connection with said tool adjusting means, a tubular extension releasably attached to said driving end, a longitudinally movable element within said tube extension releasably secured to the extending means of said adjusting means, means for preventing said movable element from turning relative to said tubular extension, an adjusting end releasably secured to said tubular extension having means for engaging and adjusting said longitudinally movable means, and means projecting from said adjusting head for moving said adjusting means.

6. In an abrading tool, a tool body, a plurality of sets of abrasive stones mounted in said tool body with each set oiset radially from its adjacent sets, an adjusting element provided with a plurality of sets of cams for moving said stones radially outward, spring means for moving said stones radially inward, and a pair of guide bushings at each end of the tool projecting beyond the stones when the stones are in retracted position.

7. In an abrading'tool, a tool body, a plurality of sets of abrasive stones mounted 'in said tool body, each set offset radially from its adjacent sets, an adjusting element' provided with a plurality of sets 'of cams for moving said stones radially outward, spring means for moving said stones radially inward, a pair of guide bushings at eachend of' the tool'projecting beyond the stones when the stones are in retracted position, a driving end for said tool Vhaving universal connection therewith and provided with a guide bushing, and a.rod having universal connection with said cam element projecting through said end and maintained against rotation relative thereto.

8. In an abrading tool, a tool body, a plurality of sets of'abrasive stones mounted in said tool body with adjacent sets oiset radially from one another, an adjusting element provided with a plurality of setsl of cams for moving said stones radially outward, spring means `for moving said stones radially inward, a pair of guide bushings at each end of the tool radially projecting beyond the stones when the stones are in retracted position, a driving end for said tool having universal connection therewith and provided with a guide bushing, a rod having Vuniversal connection with said cam element projecting through said end and maintained against rotation relative thereto, an adjusting head for said tool, and an attachable section joining said head to said driving end 0f the tool and provided with an adjusting element for connecting the rod of the driving end to said adjusting head.

A 9. In an abrading tool, a tool body, a plurality of sets of abrasive stones mounted in said tool body with one set offset radially from its adjacent sets, an adjusting element provided with a plurality of sets of cams for moving said stones radially outward, spring means for moving said stones radially inward, a pair of guide bushings at each end of the tool radially projecting beyond the stones when the stones are in retracted position, a driving end Vfor said tool having universal connection therewith and provided with a guide bushing, a rod having universal connection with said cam element projecting through said end and maintained against rotation relative thereto, an adjusting head for said tool, an attachable section joining said head to said driving end of the tool and provided with an adjusting element for connecting the rod of the driving end to said adjusting head, driving means on said adjusting end, and means carried by said driving means by which said adjusting head is actuated.

10. In an abrading tool, a tool body, having adjustable means for radially positioning the abrasive stones thereof, an adjusting head by which the body is driven in rotation and adjusted to a predetermined diameter, a tubular section having a relatively movable element, a spring in said section for urging said element in a direction to collapse the stones of said tool body, and means for releasably attaching said section and element to said body, adjusting means and adjusting head.

11. In an abrading tool, a tool body, having adjustable means for radially positioning the abrasive stones thereof, an adjusting head by which the body is driven in rotation and adjusted to a predetermined diameter, a tubular section having a. relatively movable element, a spring Acarried by said tubular section for urging said element in a direction to collapse the stones of said tool body, means for releasably attaching said section and element into said body, adjusting means and adjusting head, and means on said head by which said element and adjusting means are positioned.

12. In an abrading tool, a tool body, having adjustable means for radially positioning the abrasive stones thereof, an adjusting head by which the body is driven in rotation and adjusted to a predetermined diameter, a tubular section having a relatively movable element, a spring 10 

